High-temperature-resistant and corrosion-resistant miniature circuit breaker

Abstract

The utility model provides a miniature circuit breaker resistant to high temperature and corrosion, which belongs to the technical field of circuit breakers and comprises an external mechanism, the external mechanism comprises a base shell, the base shell is provided with a safety mechanism and an arc extinguishing mechanism in a matched mode, and the safety mechanism comprises a connecting piece connected to the inner side face of the base shell in an inserted mode. A coil is installed on the lower surface of the connecting piece in a matched mode, a metal frame is connected to the surface of the coil in an inserted mode, a ball joint is connected to the side face of the metal frame in an embedded mode, the outer surface of the ball joint is rotationally sleeved with a long rod, the long rod is provided with a dislocation piece in a matched mode, and a swing arm is arranged beside the dislocation piece. Through the running fit of the swing arm, the vertical rod and the swing lever, the swing lever can be flexibly rotated, the safe circuit breaking effect is more timely and rapid, the angular gear ring is connected with the alignment track in a clamping manner, so that the rotating motion is limited, and the rotating angle is more stable; and the alignment track is kept stable, and shaking is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and in particular relates to a high-temperature resistant and corrosion-resistant miniature circuit breaker. Background Art

[0002] The shells of existing molded case circuit breakers are mostly made of ordinary plastic. The plastic shell has low strength, insufficient toughness, poor corrosion resistance, and cannot withstand high temperatures. When the circuit breaker is working, high temperatures will be generated, which may damage the shell. Long-term use may cause corrosion by the external environment, posing a safety hazard.

[0003] In the prior art, a molded case circuit breaker with application number: 202321295311.6 includes: a molded case, a core fixing ring is provided at the upper end of the molded case, a current detection element is provided at the right end of the core fixing ring, a display screen is provided at the upper end of the molded case, the inner side of the display screen is fixedly connected to the current detection element, and the molded case material is made of carbon fiber composite plastic; a first connecting piece, the upper end of the first connecting piece is fixedly connected to the molded case, a second connecting piece is provided at the upper end of the first connecting piece, and the upper end of the second connecting piece is fixedly connected to the core fixing ring.

[0004] In the above, the safety protection function of the circuit breaker is basically achieved by cooperating with the wire core fixing ring and the first connecting piece and the second connecting piece. However, after reading through the scheme, it is found that the spring is used to adjust the left and right balance of the lever. The spring is an energy storage element that needs to store and release energy. The elastic force is not stable enough, and it is difficult to ensure the displacement symmetry of the left and right sides of the lever, which leads to the failure of the subsequent safety circuit breaker effect. Therefore, improvement is needed. Utility Model Content

[0005] The purpose of the present utility model is to provide a high temperature resistant and corrosion resistant miniature circuit breaker, aiming to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: it includes an external mechanism, the external mechanism includes a base shell, the base shell is equipped with a safety mechanism and an arc extinguishing mechanism, the safety mechanism includes a connecting piece that is plugged into the inner side of the base shell, the lower surface of the connecting piece is adapted to be installed with a coil, the surface of the coil is plugged into a metal frame, the side of the metal frame is engaged with a ball joint, the outer surface of the ball joint is rotatably sleeved with a long rod, the long rod is equipped with a dislocation piece, a swing arm is provided on the side of the dislocation piece, the end face of the swing arm is rotatably connected to a vertical pole, and the vertical pole is equipped with a swing lever.

[0007] As a preferred solution of the present invention, the dislocating part includes a positioning shaft that is rotatably sleeved, the surface of the positioning shaft is fixedly sleeved with an angular gear ring, the teeth of the angular gear ring are clamped and connected to the alignment track, the side of the alignment track is plugged and connected to the support rod, and the end face of the angular gear ring is fixedly connected to the swing arm, and the angle between the swing arm and the swing lever is an acute angle.

[0008] As a preferred solution of the present invention, the side of the swing lever is fixedly connected to a toggle support rod, the top of the toggle support rod is snap-connected to a circuit breaker switch, and the circuit breaker switch is an integrally formed circular long-handled rod.

[0009] As a preferred solution of the present invention, a spring rod is adaptively mounted on the bottom of the swing lever, an end surface of the spring rod is rotatably connected to a vertical frame, and the vertical frame is adaptively mounted on the base shell.

[0010] As a preferred solution of the present invention, the vertical frame is rotatably sleeved with an oblique rod through a pin shaft, the upper surface of the oblique rod is fixedly connected to a breaking contact piece, and the top of the breaking contact piece is movably connected to the arc extinguishing chamber.

[0011] As a preferred solution of the present invention, an insulating straight plate is adapted to be installed on the lower surface of the oblique rod, and the insulating straight plate is an integrally formed silicone plate.

[0012] As a preferred solution of the present invention, the external mechanism further includes a placement groove starting from the top of the base shell, and the inner cavity of the placement groove is fixedly connected to the current monitoring component.

[0013] Compared with the prior art, the beneficial effects of the present invention are: through the rotation coordination of the swing arm, the vertical pole and the swing lever, the swing lever can be used for flexible rotation, the safety circuit breaker effect is more timely and rapid, the clip connection between the angle gear ring and the alignment track limits the rotation trajectory, and the rotation angle is smoother and more stable. The plug-in connection between the support rod and the alignment track allows the alignment track to maintain its own stability and reduce shaking. The clip connection between the circuit breaker switch and the toggle support rod allows the swing lever to directly control the on and off of the circuit breaker switch, and the safety effect is more direct. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of all parts in the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the parts related to achieving safe switching and protection against high-temperature current shock in the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of the parts related to achieving the stable current series effect in the present invention;

[0019] Figure 5 For this utility model Figure 2 A partial enlarged schematic diagram of part A.

[0020] In the figure: 100, external mechanism; 101, base shell; 102, current monitoring component; 103, placement slot; 200, safety mechanism; 201, connecting piece; 202, coil; 203, metal frame; 204, ball joint; 205, long rod; 206, dislocation piece; 206a, positioning shaft; 206b, angular gear ring; 206c, alignment track; 206d, support rod; 207, swing arm; 208, vertical pole; 209, swing lever; 210, toggle support rod; 211, circuit breaker; 300, arc extinguishing mechanism; 301, spring rod; 302, vertical frame; 303, inclined rod; 304, contact piece; 305, arc extinguishing chamber; 306, insulating straight plate. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0022] The present invention provides a high temperature and corrosion resistant miniature circuit breaker, including an external mechanism 100; for example, Figure 1-Figure 3 shown.

[0023] The external mechanism 100 includes a base shell 101, and the base shell 101 is equipped with a safety mechanism 200 and an arc extinguishing mechanism 300. The safety mechanism 200 includes a connecting piece 201 that is plugged into the inner side of the base shell 101. The lower surface of the connecting piece 201 is adapted to be installed with a coil 202. The surface of the coil 202 is plugged into a metal frame 203. The side of the metal frame 203 is engaged with a ball joint 204. The outer surface of the ball joint 204 is rotatably sleeved with a long rod 205, and the long rod 205 is equipped with a dislocation piece 206. A swing arm 207 is provided on the side of the dislocation piece 206. The end face of the swing arm 207 is rotatably connected to a vertical rod 208, and the vertical rod 208 is equipped with a swing lever 209.

[0024] The dislocating member 206 includes a positioning shaft 206a that is rotatably sleeved, and an angular gear ring 206b is fixedly sleeved on the surface of the positioning shaft 206a. The teeth of the angular gear ring 206b are connected to the alignment track 206c, and the side of the alignment track 206c is plugged into a support rod 206d. The end face of the angular gear ring 206b is fixedly connected to the swing arm 207, and the angle between the swing arm 207 and the swing lever 209 is an acute angle.

[0025] A toggle support rod 210 is fixedly connected to the side of the swing lever 209 , and a circuit breaker switch 211 is snap-connected to the top of the toggle support rod 210 . The circuit breaker switch 211 is an integrally formed circular long-handled rod.

[0026] Specifically, the external mechanism 100 is provided with the safety mechanism 200 and the arc extinguishing mechanism 300, so that the circuit breaker has a good safety on-off function. The connecting piece 201 and the coil 202 are adapted and installed so that the coil 202 can generate magnetic force by energizing the connecting piece 201. The metal frame 203 is fixedly connected to the ball joint 204 so that the magnetic force drives the ball joint 204 to rotate through the metal frame 203. The long rod 205 is provided with the dislocation member 206 so that the rotation motion is transmitted again. The swing arm 207 is connected with the vertical rod 208 and the swing arm 208. The rotation coordination of the lever 209 can be used for the flexible rotation of the swing lever 209, and the safety circuit breaker effect is more timely and rapid. The snap connection between the angle gear ring 206b and the alignment track 206c limits the rotation trajectory and makes the rotation angle more stable. The plug-in connection between the support rod 206d and the alignment track 206c enables the alignment track 206c to maintain its own stability and reduce shaking. The snap connection between the circuit breaker switch 211 and the toggle support rod 210 enables the swing lever 209 to directly control the on and off of the circuit breaker switch 211, and the safety effect is more direct.

[0027] The bottom of the swing lever 209 is adapted to be mounted with a spring rod 301; for example, Figure 2-Figure 4 shown.

[0028] The end surface of the spring rod 301 is rotatably connected to a vertical frame 302 , and the vertical frame 302 is adapted to be installed with the base shell 101 .

[0029] The vertical frame 302 is rotatably sleeved with an oblique rod 303 via a pin shaft. A breaking contact piece 304 is fixedly connected to the upper surface of the oblique rod 303 . The top of the breaking contact piece 304 is movably engaged with an arc extinguishing chamber 305 .

[0030] Specifically, the rotating sleeve connection of the oblique rod 303 and the vertical frame 302 allows the breaking contact piece 304 to flexibly contact the arc extinguishing chamber 305, so that the electric spark is extinguished in time, greatly improving the circuit breaker safety effect.

[0031] The lower surface of the inclined rod 303 is adapted to be mounted with an insulating straight plate 306; for example, Figure 3-Figure 5 shown.

[0032] The insulating straight plate 306 is an integrally formed silicone plate.

[0033] The external mechanism 100 further includes a placement groove 103 starting from the top of the base shell 101 , and a current monitoring component 102 is fixedly connected to the inner cavity of the placement groove 103 .

[0034] Specifically, the provision of the insulating straight plate 306 enables the circuit breaker to have an electrostatic placement effect, and the fixed connection between the placement slot 103 and the current monitoring element 102 can be used for the active on-off function of the circuit breaker.

[0035] Working principle: First, connect the connecting piece 201 to the mains power, then energize the coil 202 to generate magnetic force, which drives the ball joint 204 located on the side of the metal frame 203 to rotate. The long rod 205 rotates synchronously under the fixed-point support of the ball joint 204 and the positioning shaft 206a. Then, an angular gear ring 206b is set on the inner side of the end face of the long rod 205 and movably plugs into the alignment track 206c, effectively improving the disadvantage of insensitive switching. Then, under the multiple transmission effects of the swing arm 207, the swing lever 209 swings stably, and one end of it will flexibly switch the circuit breaker 211 on and off by toggling the support rod 210.

[0036] When the internal current of the circuit breaker is abnormal, the swing lever 209 will drive the spring rod 301 to rotate obliquely downward, and the oblique rod 303 will cause the breaking contact piece 304 to break contact with the arc extinguishing chamber 305. The electric spark generated after the separation is extinguished by the arc extinguishing chamber 305. Then the current monitoring component 102 detects the current abnormality in a short period of time and immediately disconnects the mains connection, so that the circuit breaker can play its safety protection function in time.

[0037] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0038] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0039] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A high temperature and corrosion resistant miniature circuit breaker, characterized by: The invention comprises an external mechanism (100), wherein the external mechanism (100) comprises a base shell (101), wherein the base shell (101) is provided with a safety mechanism (200) and an arc extinguishing mechanism (300), wherein the safety mechanism (200) comprises a connecting piece (201) plug-connected to the inner side of the base shell (101), wherein a coil (202) is adapted to be installed on the lower surface of the connecting piece (201), and wherein the surface of the coil (202) is plug-connected to a metal frame. (203), the side of the metal frame (203) is engaged with a ball joint (204), the outer surface of the ball joint (204) is rotatably sleeved with a long rod (205), the long rod (205) is matched with a dislocation piece (206), the side of the dislocation piece (206) is provided with a swing arm (207), the end face of the swing arm (207) is rotatably connected to a vertical rod (208), and the vertical rod (208) is matched with a swing lever (209).

2. The high temperature and corrosion resistant miniature circuit breaker according to claim 1, characterized in that: The dislocating member (206) includes a positioning shaft (206a) rotatably sleeved, an angular gear ring (206b) fixedly sleeved on the surface of the positioning shaft (206a), the teeth of the angular gear ring (206b) being snap-connected to an alignment track (206c), the side of the alignment track (206c) being plug-connected to a support rod (206d), and the end face of the angular gear ring (206b) being fixedly connected to the swing arm (207), and the angle between the swing arm (207) and the swing lever (209) being an acute angle.

3. The high temperature and corrosion resistant miniature circuit breaker according to claim 2, characterized in that: The side of the swing lever (209) is fixedly connected to a toggle support rod (210), and the top of the toggle support rod (210) is snap-connected to a circuit breaker (211), and the circuit breaker (211) is an integrally formed circular ring with a long handle.

4. The high temperature and corrosion resistant miniature circuit breaker according to claim 3, characterized in that: The bottom of the swing lever (209) is adapted to be installed with a spring rod (301), the end surface of the spring rod (301) is rotatably connected to a vertical frame (302), and the vertical frame (302) is adapted to be installed with the base shell (101).

5. The high temperature and corrosion resistant miniature circuit breaker according to claim 4, characterized in that: The vertical frame (302) is rotatably sleeved with an inclined rod (303) via a pin shaft, the upper surface of the inclined rod (303) is fixedly connected with a breaking contact piece (304), and the top of the breaking contact piece (304) is movably connected with an arc extinguishing chamber (305).

6. The high temperature and corrosion resistant miniature circuit breaker according to claim 5, characterized in that: An insulating straight plate (306) is adapted and mounted on the lower surface of the oblique rod (303), and the insulating straight plate (306) is an integrally formed silicone plate.

7. The high temperature and corrosion resistant miniature circuit breaker according to claim 1, characterized in that: The external mechanism (100) further comprises a placement groove (103) starting from the top of the base shell (101), and the inner cavity of the placement groove (103) is fixedly connected to the current monitoring component (102).

Images